MVTableEngine: support online backup on Windows

h2/src/main/org/h2/mvstore/db/MVTableEngine.java

@@ -231,7 +231,7 @@ public class MVTableEngine implements TableEngine {
         }
 
         public InputStream getInputStream() {
-            return new FileChannelInputStream(store.getFile());
+            return new FileChannelInputStream(store.getFile(), false);
         }
 
     }

h2/src/main/org/h2/store/fs/FileChannelInputStream.java

@@ -17,15 +17,18 @@ import java.nio.channels.FileChannel;
 public class FileChannelInputStream extends InputStream {
 
     private final FileChannel channel;
+    private final boolean closeChannel;
     private final byte[] buffer = { 0 };
 
     /**
      * Create a new file object input stream from the file channel.
      *
      * @param channel the file channel
+     * @param closeChannel whether closing the stream should close the channel
      */
-    public FileChannelInputStream(FileChannel channel) {
+    public FileChannelInputStream(FileChannel channel, boolean closeChannel) {
         this.channel = channel;
+        this.closeChannel = closeChannel;
     }
 
     @Override
@@ -53,7 +56,9 @@ public class FileChannelInputStream extends InputStream {
 
     @Override
     public void close() throws IOException {
-        channel.close();
+        if (closeChannel) {
+            channel.close();
+        }
     }
 
 }

h2/src/main/org/h2/store/fs/FilePathCrypt.java

@@ -77,7 +77,7 @@ public class FilePathCrypt extends FilePathWrapper {
 
     @Override
     public InputStream newInputStream() throws IOException {
-        return new FileChannelInputStream(open("r"));
+        return new FileChannelInputStream(open("r"), true);
     }
 
     /**

h2/src/main/org/h2/store/fs/FilePathMem.java

@@ -162,7 +162,7 @@ public class FilePathMem extends FilePath {
     public InputStream newInputStream() {
         FileMemData obj = getMemoryFile();
         FileMem m = new FileMem(obj, true);
-        return new FileChannelInputStream(m);
+        return new FileChannelInputStream(m, true);
     }
 
     @Override

h2/src/main/org/h2/store/fs/FilePathNioMem.java

@@ -162,7 +162,7 @@ public class FilePathNioMem extends FilePath {
     public InputStream newInputStream() {
         FileNioMemData obj = getMemoryFile();
         FileNioMem m = new FileNioMem(obj, true);
-        return new FileChannelInputStream(m);
+        return new FileChannelInputStream(m, true);
     }
 
     @Override

h2/src/main/org/h2/store/fs/FilePathZip.java

@@ -171,7 +171,7 @@ public class FilePathZip extends FilePath {
 
     @Override
     public InputStream newInputStream() throws IOException {
-        return new FileChannelInputStream(open("r"));
+        return new FileChannelInputStream(open("r"), true);
     }
 
     @Override

h2/src/tools/org/h2/dev/fs/FilePathZip2.java

@@ -245,7 +245,7 @@ public class FilePathZip2 extends FilePath {
 
     @Override
     public InputStream newInputStream() throws IOException {
-        return new FileChannelInputStream(open("r"));
+        return new FileChannelInputStream(open("r"), true);
     }
 
     @Override